Internal-Tooth Lock Washers

137 products

Internal-Tooth Lock Washers

Internal-Tooth Lock Washers are critical components in preventing fastener loosening due to vibration, thermal expansion, or dynamic loads. Our selection includes split, tooth, and wedge-lock designs manufactured from high-strength materials like spring steel and stainless steel. These washers provide a reliable mechanical lock by creating tension or biting into the mating surface, ensuring long-term structural integrity in automotive, aerospace, and heavy machinery applications. Engineered to meet rigorous industrial standards, they offer exceptional performance in high-vibration environments.

System of Measurement
Inch Metric
For Screw Size
1 1/2" 1 1/4" 1 1/8" 1 3/8" 1" 1/2" 1/4" 3/4" 3/8" 5/16" 5/8" 7/16" 7/8" 9/16" M10 M12 M14 M16 M18 M2 M2.3 M2.5 M2.6 M20 M22 M24 M3 M3.5 M4 M5 M6 M7 M8 No. 10 No. 12 No. 2 No. 3 No. 4 No. 5 No. 6 No. 8 No. 9
Specifications Met
ASME B18.21.1 DIN 6797
ID
0.089" 0.095" 0.102" 0.109" 0.115" 0.123" 0.129" 0.136" 0.141" 0.15" 0.168" 0.176" 0.195" 0.204" 0.221" 0.231" 0.256" 0.267" 0.32" 0.384" 0.448" 0.512" 0.53" 0.576" 0.64" 0.768" 0.769" 0.795" 0.894" 0.927" 1.019" 1.06" 1.144" 1.275" 1.394" 1.5" 2.2 mm 2.5 mm 2.7 mm 2.8 mm 3.2 mm 3.7 mm 4.3 mm 5.3 mm 6.4 mm 7.4 mm 8.4 mm 10.5 mm 13 mm 15 mm 17 mm 19 mm 21 mm 23 mm 25 mm
OD
0.2" 0.232" 0.27" 0.28" 0.295" 0.34" 0.381" 0.41" 0.478" 0.536" 0.607" 0.61" 0.692" 0.747" 0.789" 0.867" 0.883" 0.9" 0.923" 0.985" 1.071" 1.134" 1.245" 1.26" 1.41" 1.637" 1.64" 1.83" 1.95" 1.975" 2.515" 4.5 mm 5 mm 5.5 mm 6 mm 7 mm 8 mm 10 mm 11 mm 12.5 mm 15 mm 18 mm 20.5 mm 24 mm 26 mm 30 mm 33 mm 36 mm 38 mm
Material
18-8 Stainless Steel 316 Stainless Steel 400 Series Stainless Steel Black-Oxide Steel Bronze Zinc-Plated Steel
Thickness
0.010-0.016" 0.012-0.018" 0.014-0.018" 0.014-0.020" 0.016-0.022" 0.018-0.024" 0.018-0.023" 0.020-0.027" 0.023-0.028" 0.028-0.034" 0.032-0.040" 0.034-0.044" 0.037-0.045" 0.040-0.050" 0.042-0.050" 0.047-0.055" 0.052-0.060" 0.054-0.070" 0.059-0.067" 0.060-0.064" 0.073-0.083" 0.076-0.080" 0.2-0.4 mm 0.2-0.5 mm 0.3-0.5 mm 0.4-0.6 mm 0.5-0.7 mm 0.6-0.8 mm 0.7-0.9 mm 0.8-1.0 mm 0.9-1.2 mm 1.0-1.4 mm 1.2-1.5 mm 1.3-1.6 mm
Part Number Material For Screw Size ID OD Thickness Washer Type Hardness Specifications Met Fastener Strength Grade/Class
1319FA00044 18-8 Stainless Steel 1/2" 0.512" 0.9" 0.037-0.045" Tooth Lock Rockwell C40 ASME B18.21.1 -
1319FA00041 18-8 Stainless Steel 1/4" 0.256" 0.478" 0.023-0.028" Tooth Lock Not Rated ASME B18.21.1 -
1319FA00047 18-8 Stainless Steel 3/4" 0.769" 1.245" 0.047-0.055" Tooth Lock Rockwell C40 ASME B18.21.1 -
1319FA00043 18-8 Stainless Steel 3/8" 0.384" 0.692" 0.032-0.040" Tooth Lock Not Rated ASME B18.21.1 -
1319FA00042 18-8 Stainless Steel 5/16" 0.32" 0.61" 0.028-0.034" Tooth Lock Not Rated ASME B18.21.1 -
1319FA00046 18-8 Stainless Steel 5/8" 0.64" 1.071" 0.042-0.050" Tooth Lock Rockwell C40 ASME B18.21.1 -
1319FA00045 18-8 Stainless Steel 9/16" 0.576" 0.985" 0.037-0.045" Tooth Lock Rockwell C40 ASME B18.21.1 -
1320FA00024 18-8 Stainless Steel M10 10.5 mm 18 mm 0.8-1.0 mm Tooth Lock Not Rated DIN 6797 -
1320FA00025 18-8 Stainless Steel M12 13 mm 20.5 mm 0.9-1.2 mm Tooth Lock Not Rated DIN 6797 -
1320FA00026 18-8 Stainless Steel M14 15 mm 24 mm 0.9-1.2 mm Tooth Lock Not Rated DIN 6797 -
1320FA00027 18-8 Stainless Steel M16 17 mm 26 mm 1.0-1.4 mm Tooth Lock Not Rated DIN 6797 -
1320FA00028 18-8 Stainless Steel M18 19 mm 30 mm 1.2-1.5 mm Tooth Lock Not Rated DIN 6797 -
1320FA00016 18-8 Stainless Steel M2 2.2 mm 4.5 mm 0.2-0.4 mm Tooth Lock Not Rated DIN 6797 -
1320FA00030 18-8 Stainless Steel M2.3 2.5 mm 5 mm 0.2-0.4 mm Tooth Lock Not Rated DIN 6797 -
1320FA00017 18-8 Stainless Steel M2.5 2.7 mm 5.5 mm 0.2-0.5 mm Tooth Lock Not Rated DIN 6797 -
1320FA00029 18-8 Stainless Steel M20 21 mm 33 mm 1.2-1.5 mm Tooth Lock Not Rated DIN 6797 -
1320FA00032 18-8 Stainless Steel M22 23 mm 36 mm 1.3-1.6 mm Tooth Lock Not Rated DIN 6797 -
1320FA00033 18-8 Stainless Steel M24 25 mm 38 mm 1.3-1.6 mm Tooth Lock Not Rated DIN 6797 -
1320FA00019 18-8 Stainless Steel M3 3.2 mm 6 mm 0.3-0.5 mm Tooth Lock Not Rated DIN 6797 -
1320FA00018 18-8 Stainless Steel M3.5 3.7 mm 7 mm 0.4-0.6 mm Tooth Lock Not Rated DIN 6797 -
1320FA00020 18-8 Stainless Steel M4 4.3 mm 8 mm 0.4-0.6 mm Tooth Lock Not Rated DIN 6797 -
1320FA00021 18-8 Stainless Steel M5 5.3 mm 10 mm 0.5-0.7 mm Tooth Lock Not Rated DIN 6797 -
1320FA00022 18-8 Stainless Steel M6 6.4 mm 11 mm 0.6-0.8 mm Tooth Lock Not Rated DIN 6797 -
1320FA00031 18-8 Stainless Steel M7 7.4 mm 12.5 mm 0.7-0.9 mm Tooth Lock Not Rated DIN 6797 -
1320FA00023 18-8 Stainless Steel M8 8.4 mm 15 mm 0.7-0.9 mm Tooth Lock Not Rated DIN 6797 -
1319FA00040 18-8 Stainless Steel No. 10 0.195" 0.381" 0.018-0.024" Tooth Lock Not Rated ASME B18.21.1 -
1319FA00048 18-8 Stainless Steel No. 12 0.231" 0.41" 0.020-0.027" Tooth Lock Not Rated ASME B18.21.1 -
1319FA00037 18-8 Stainless Steel No. 4 0.115" 0.27" 0.012-0.018" Tooth Lock Not Rated ASME B18.21.1 -
1319FA00038 18-8 Stainless Steel No. 6 0.141" 0.295" 0.016-0.022" Tooth Lock Not Rated ASME B18.21.1 -
1319FA00039 18-8 Stainless Steel No. 8 0.168" 0.34" 0.018-0.023" Tooth Lock Not Rated ASME B18.21.1 -
1319FA00002 316 Stainless Steel 1/2" 0.53" 0.867" 0.037-0.045" Tooth Lock Not Rated ASME B18.21.1 -
1319FA00006 316 Stainless Steel 1/4" 0.256" 0.478" 0.023-0.028" Tooth Lock Not Rated ASME B18.21.1 -
1319FA00008 316 Stainless Steel 3/8" 0.384" 0.692" 0.032-0.040" Tooth Lock Not Rated ASME B18.21.1 -
1319FA00007 316 Stainless Steel 5/16" 0.32" 0.61" 0.028-0.034" Tooth Lock Not Rated ASME B18.21.1 -
1319FA00005 316 Stainless Steel No. 10 0.195" 0.381" 0.018-0.024" Tooth Lock Not Rated ASME B18.21.1 -
1319FA00001 316 Stainless Steel No. 4 0.115" 0.27" 0.012-0.018" Tooth Lock Not Rated ASME B18.21.1 -
1319FA00003 316 Stainless Steel No. 6 0.141" 0.295" 0.016-0.022" Tooth Lock Not Rated ASME B18.21.1 -
1319FA00004 316 Stainless Steel No. 8 0.168" 0.34" 0.018-0.023" Tooth Lock Not Rated ASME B18.21.1 -
1319FA00079 400 Series Stainless Steel 1" 1.06" 1.64" 0.059-0.067" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00074 400 Series Stainless Steel 1/2" 0.512" 0.9" 0.037-0.045" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00088 400 Series Stainless Steel 1/4" 0.256" 0.478" 0.023-0.028" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00070 400 Series Stainless Steel 1/4" 0.267" 0.478" 0.023-0.028" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00077 400 Series Stainless Steel 3/4" 0.769" 1.245" 0.047-0.055" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00072 400 Series Stainless Steel 3/8" 0.384" 0.692" 0.032-0.040" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00071 400 Series Stainless Steel 5/16" 0.32" 0.61" 0.028-0.034" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00076 400 Series Stainless Steel 5/8" 0.64" 1.071" 0.042-0.050" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00073 400 Series Stainless Steel 7/16" 0.448" 0.789" 0.032-0.040" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00078 400 Series Stainless Steel 7/8" 0.927" 1.41" 0.052-0.060" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00075 400 Series Stainless Steel 9/16" 0.576" 0.985" 0.037-0.045" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00086 400 Series Stainless Steel No. 10 0.195" 0.381" 0.018-0.024" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00069 400 Series Stainless Steel No. 10 0.204" 0.381" 0.018-0.024" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00087 400 Series Stainless Steel No. 12 0.221" 0.41" 0.020-0.027" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00080 400 Series Stainless Steel No. 2 0.089" 0.2" 0.010-0.016" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00064 400 Series Stainless Steel No. 2 0.095" 0.2" 0.010-0.016" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00081 400 Series Stainless Steel No. 3 0.102" 0.232" 0.010-0.016" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00082 400 Series Stainless Steel No. 4 0.115" 0.27" 0.012-0.018" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00065 400 Series Stainless Steel No. 4 0.123" 0.27" 0.012-0.018" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00066 400 Series Stainless Steel No. 5 0.136" 0.28" 0.014-0.020" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00083 400 Series Stainless Steel No. 5 0.136" 0.28" 0.014-0.020" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00084 400 Series Stainless Steel No. 6 0.141" 0.295" 0.016-0.022" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00067 400 Series Stainless Steel No. 6 0.15" 0.295" 0.016-0.022" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00085 400 Series Stainless Steel No. 8 0.168" 0.34" 0.018-0.023" Tooth Lock Rockwell C34 ASME B18.21.1 -
1319FA00068 400 Series Stainless Steel No. 9 0.176" 0.34" 0.018-0.023" Tooth Lock Rockwell C34 ASME B18.21.1 -
1320FA00009 Black-Oxide Steel M10 10.5 mm 18 mm 0.8-1.0 mm Tooth Lock Rockwell C35 DIN 6797 -
1320FA00010 Black-Oxide Steel M12 13 mm 20.5 mm 0.9-1.2 mm Tooth Lock Rockwell C35 DIN 6797 -
1320FA00011 Black-Oxide Steel M14 15 mm 24 mm 0.9-1.2 mm Tooth Lock Rockwell C35 DIN 6797 -
1320FA00012 Black-Oxide Steel M16 17 mm 26 mm 1.0-1.4 mm Tooth Lock Rockwell C35 DIN 6797 -
1320FA00013 Black-Oxide Steel M18 19 mm 30 mm 1.2-1.5 mm Tooth Lock Rockwell C35 DIN 6797 -
1320FA00001 Black-Oxide Steel M2 2.2 mm 4.5 mm 0.2-0.4 mm Tooth Lock Rockwell C35 DIN 6797 -
1320FA00015 Black-Oxide Steel M2.5 2.7 mm 5.5 mm 0.2-0.5 mm Tooth Lock Rockwell C35 DIN 6797 -
1320FA00002 Black-Oxide Steel M2.6 2.8 mm 5.5 mm 0.3-0.5 mm Tooth Lock Rockwell C35 DIN 6797 -
1320FA00014 Black-Oxide Steel M20 21 mm 33 mm 1.2-1.5 mm Tooth Lock Rockwell C35 DIN 6797 -
1320FA00003 Black-Oxide Steel M3 3.2 mm 6 mm 0.3-0.5 mm Tooth Lock Rockwell C35 DIN 6797 -
1320FA00004 Black-Oxide Steel M3.5 3.7 mm 7 mm 0.4-0.6 mm Tooth Lock Rockwell C35 DIN 6797 -
1320FA00005 Black-Oxide Steel M4 4.3 mm 8 mm 0.4-0.6 mm Tooth Lock Rockwell C35 DIN 6797 -
1320FA00006 Black-Oxide Steel M5 5.3 mm 10 mm 0.5-0.7 mm Tooth Lock Rockwell C35 DIN 6797 -
1320FA00007 Black-Oxide Steel M6 6.4 mm 11 mm 0.6-0.8 mm Tooth Lock Rockwell C35 DIN 6797 -
1320FA00008 Black-Oxide Steel M8 8.4 mm 15 mm 0.7-0.9 mm Tooth Lock Rockwell C35 DIN 6797 -
1319FA00058 Bronze 1/2" 0.512" 0.9" 0.037-0.045" Tooth Lock Rockwell B60 ASME B18.21.1 -
1319FA00054 Bronze 1/4" 0.256" 0.478" 0.023-0.028" Tooth Lock Rockwell B60 ASME B18.21.1 -
1319FA00063 Bronze 3/4" 0.795" 1.245" 0.047-0.055" Tooth Lock Rockwell B60 ASME B18.21.1 -
1319FA00056 Bronze 3/8" 0.384" 0.692" 0.032-0.040" Tooth Lock Rockwell B60 ASME B18.21.1 -
1319FA00055 Bronze 5/16" 0.32" 0.61" 0.028-0.034" Tooth Lock Rockwell B60 ASME B18.21.1 -
1319FA00059 Bronze 5/8" 0.64" 1.071" 0.042-0.050" Tooth Lock Rockwell B60 ASME B18.21.1 -
1319FA00057 Bronze 7/16" 0.448" 0.789" 0.032-0.040" Tooth Lock Rockwell B60 ASME B18.21.1 -
1319FA00053 Bronze No. 10 0.195" 0.381" 0.018-0.024" Tooth Lock Rockwell B60 ASME B18.21.1 -
1319FA00062 Bronze No. 12 0.231" 0.41" 0.020-0.027" Tooth Lock Rockwell B60 ASME B18.21.1 -
1319FA00049 Bronze No. 2 0.089" 0.2" 0.010-0.016" Tooth Lock Rockwell B60 ASME B18.21.1 -
1319FA00060 Bronze No. 3 0.109" 0.232" 0.010-0.016" Tooth Lock Rockwell B60 ASME B18.21.1 -
1319FA00050 Bronze No. 4 0.115" 0.27" 0.012-0.018" Tooth Lock Rockwell B60 ASME B18.21.1 -
1319FA00061 Bronze No. 5 0.136" 0.28" 0.014-0.018" Tooth Lock Rockwell B60 ASME B18.21.1 -
1319FA00051 Bronze No. 6 0.141" 0.295" 0.016-0.022" Tooth Lock Rockwell B60 ASME B18.21.1 -
1319FA00052 Bronze No. 8 0.168" 0.34" 0.018-0.023" Tooth Lock Rockwell B60 ASME B18.21.1 -
1319FA00030 Zinc-Plated Steel 1 1/2" 1.5" 2.515" 0.076-0.080" Tooth Lock Rockwell C44 - -
1319FA00028 Zinc-Plated Steel 1 1/4" 1.275" 1.975" 0.059-0.067" Tooth Lock Rockwell C44 ASME B18.21.1 -
1319FA00027 Zinc-Plated Steel 1 1/8" 1.144" 1.83" 0.059-0.067" Tooth Lock Rockwell C44 ASME B18.21.1 -
1319FA00029 Zinc-Plated Steel 1 3/8" 1.394" 1.95" 0.060-0.064" Tooth Lock Rockwell C44 - -
1319FA00026 Zinc-Plated Steel 1" 1.019" 1.637" 0.059-0.067" Tooth Lock Rockwell C44 ASME B18.21.1 -
1319FA00021 Zinc-Plated Steel 1/2" 0.512" 0.883" 0.037-0.045" Tooth Lock Rockwell C44 ASME B18.21.1 -
1319FA00034 Zinc-Plated Steel 1/2" 0.512" 0.923" 0.054-0.070" Tooth Lock Rockwell C44 ASME B18.21.1 Grade 8
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